I'm not sure if it's supposed to be like that, but it's not even possible to remove them in survival mode. I am thinking it could be conflicting mods from other mods in the modpack, but I'm not sure.

This issue has been marked as stale because it has been inactive for 3 weeks. It will be closed if it remains inactive for another 3 weeks.

This issue has been closed since it has been inactive for 3 weeks since it was marked as stale.

I have also seen a really big patch of waterlogged limestone walls just going down around 50 or so blocks before hitting normal stone. They also seem to lag me out, sometimes I get immobilized when I get too close and start lagging back.